Teen William Shultz Fatally Stabbed 9-Year-Old To 'See What It Was Like': Report

A California teen accused of fatally stabbing his best friend's 9-year-old brother told a reporter he did so because he "wanted to see what it was like."

In an exclusive jailhouse interview with the Contra Costa Times, 18-year-old William Shultz told a reporter he wished he hadn't killed Jordon Almgren, smiling as he talked about his own mental health.

"I do have remorse for what I did," Shultz told the publication. "But there's a reason for everything that happens."

Shultz was arrested last Sunday after allegedly killing the child earlier that morning. After having an argument with his parents, the teen spent the night at his best friend's house, where he and others ate pizza and played video games. After everyone had gone to sleep, Shultz said he remained awake with thoughts of paranoia. That's when he said he went into the child's room.

The suspect told Contra Costa Times that he had started to notice coincidences in books he read, obsessed with the number three and worried that the world would soon come to an end. "I wanted to see what it was like to take a life before someone tried to take mine," Shultz said.

The teen has been charged with murder and one count of residential burglary.

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Infamous Serial Killers

Infamous Serial Killers

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Jeffrey Dahmer

Notorious cannibal Jeffrey Dahmer sits with his defense team during his 1991 trial. Dahmer went on a killing spree in the 1980s during which he murdered 17 men and boys. He often had sex with the corpses before dismembering them and, in some cases, ate pieces of human flesh. After his conviction, Dahmer was killed by a fellow inmate in prison.